It could prove to be a major stumbling block for McGregor’s plans, even leading to him being forced to change the name of his drinks.

Since his defeat to Mayweather, in what was the most lucrative fight in history, McGregor has been keen to invest his wealth into several new business ventures.

As well as the proposed ‘Notorious’ Irish whiskey, he also has plans to bring out his own clothing range, in collaboration with fashion designer David August Heil.

McGregor explained: “Fashion is something that I am truly passionate about, and I am excited to share exactly that with my fans by giving them a chance to share my iconic looks. I know the public will love what lies ahead.”